Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 oxides)
Category
Browse sedimentary or igneous fragment specimens identified by the Rock Identifier community.
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 oxides)
Sandstone
Arenite
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2)
Sandstone (Flagstone)
Arenite (composed primarily of SiO2)
Red Sandstone (Arkose)
Clastic Sedimentary Rock (Lithic Arkose)
Red Sandstone
Arenite (Ferruginous Sandstone)
Sandstone (with potential iron-oxide staining)
Arenite (primarily SiO2)
Sandstone (Wonderstone)
Clastic Sedimentary Rock (primarily SiO2)
Graywacke
Graywacke (immature sandstone)
Sandstone
Arenite (primarily composed of SiO2 - Silicon Dioxide)
Ferruginous Sandstone
Sandstone with Iron Oxide (Limonite/Goethite)
Sandstone
Arenite (Siliclastic sedimentary rock)
Sandstone (Ferruginous)
Arenite (Siliclastic Sedimentary Rock)
Pyrite
Iron Sulfide (FeS2)
Honey calcite (likely rough cleavage fragment)
Calcite, calcium carbonate (CaCO₃)
Scoria (Lava Rock)
Scoria (Mafic Volcanic Rock)
Chert (often called Flint or Jasper)
Microcrystalline or cryptocrystalline Quartz (SiO2)
Orange Calcite
Calcium Carbonate (CaCO3)
Green Quartz (Prasiolite/Adventurine)
Silicon Dioxide with inclusions (SiO2)
Fossilized Shark Tooth (Dermal Denticle or worn tooth fragment)
Elasmobranchii (fossil remains)
Red Sandstone (Siltstone pebble)
Arenite / Siltstone (Silicon dioxide based with hematite impurities)
Sandstone Concretion
Clastic sedimentary rock (primarily Quartz SiO2 with mineral cement)
Quartz Geode (with possible Manganese or Goethite coating)
Silicon Dioxide (SiO2)
Sandstone Pebble
Sedimentary Rock (Quartzose Sandstone)
Conglomerate
Clastic sedimentary rock (Puddingstone)
Chert (with Calcite layering)
Silicon Dioxide (SiO2) with Calcium Carbonate (CaCO3)
Slate
Slate (foliated metamorphic rock composed mainly of quartz, illite, and chlorite)
Tumbled yellow jasper or petrified wood fragment
Microcrystalline quartz (chalcedony), SiO₂, possibly iron-oxide-bearing jasper
Sandstone (likely Quartzose)
Arenite (SiO2 principal mineral)
Sandstone (with Possible Iron Staining/Crust)
Arenite (SiO2 based)
Sandstone (Ferruginous)
Arenite with Iron Oxide cement
Sandstone (likely Arkosic or Quartzose)
Sandstone (SiO2 with inclusions)
Sandstone (likely Arkosic or Lithic)
Clastic Sedimentary Rock (SiO2 with accessory minerals)
Sandstone (with potential Quartzite characteristics)
Clastic sedimentary rock (primarily SiO2)
Conglomerate
Clastic sedimentary rock (Polymict conglomerate with quartz/calcite matrix)
Conglomerate
Conglomerate
Conglomerate (Asphaltic/Anthropogenic)
Clastic sedimentary rock / Bituminous mixture
Terrazzo (Man-made Composite)
Cementitious or Resin-bound Lithic Composite
Sandstone (Ferruginous)
Arenite (primarily SiO2 with iron oxide Fe2O3 cement)
Fossiliferous limestone
Calcarenite/bioclastic limestone, predominantly calcite (CaCO₃)
Greywacke (River Pebble with Quartz Veins)
Greywacke (Indurated Sandstone); Veins: SiO2 (Quartz)
Greywacke (River/Beach Pebble)
Greywacke (Impure Sandstone)